Cayenne S (9PA) V8-4.5L (2003)
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Coolant can be extremely hot and pressurized.
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Only open the cooling system when it is cold.
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Wear gloves.
4. Carefully open the cap on the coolant expansion tank. Unscrew the cap in a counterclockwise direction.
5. Open cap on the expansion tank and remove it.
6. Remove underside panel. To do this, undo screws -1, 2 and 3-.
7. Release the front apron on the underside.
8. Remove the sheetmetal brace under the radiator. To do this, loosen the four fastening screws.